Fluid-assisted dust seal

Details Fluid-assisted dust seal Fluid-assisted dust seal

1992-07-23

1994-06-28

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 72R, 175209, E21B 3300, F16J 1540

Patent

active

053240510

ABSTRACT:
A fluid-assisted dust seal for a drill shaft includes a tubular housing, flexible seals spaced apart in the housing along its length in contact with a drill shaft therein, a fluid plenum between two adjacent seals in the housing, and a fluid inlet for admitting pressurized fluid into the plenum, to deflect the seals downwardly so as to cause fluid flow out the bottom of the seal and thereby limiting entry of dust into the housing.

REFERENCES:
patent: 980282 (1911-01-01), Junggren
patent: 1200966 (1916-10-01), Minning
patent: 1475656 (1923-11-01), Steese
patent: 2730333 (1956-01-01), Lenhart, Jr. et al.
patent: 3045769 (1962-07-01), Feucht et al.
patent: 3800890 (1974-04-01), Gyongyosi et al.
patent: 3833070 (1974-09-01), Anderson
patent: 3965998 (1976-06-01), Gyongyosi et al.
patent: 4270760 (1981-06-01), Greiman
patent: 4321975 (1975-03-01), Dyer
patent: 4605078 (1986-08-01), Bukovitz et al.
patent: 4756536 (1988-07-01), Belcher
patent: 4895205 (1990-01-01), Thompson et al.

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